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the economic science 1 scientific, i.e. objective explanations of how the economy functions. in this 2 it applies the 3 approach where economists study what it is and what it can be in reality. if an issue in positive economics is scientifically proved, there is no place to any 4 left. but there can be different 5 views on 6 problems which provide 7 for further research. economists may have their own 8 judgements on economic issues. here they deal with 9 economics where it becomes difficult to 10 disputes. however, positive economics shows the distinct 11 of how to make a normative choice.

a. disagreement
b. imply
c. subjective
d. scope
e. clarify
f. claims
g. searches for
h. unresolved
i. implications
j. regard
k. positive
l. value
m. persuasion
n. normative

1)  Did he swim better last year? (общий, т.к. ответить можно -да , или -нет))
2)   Did he swim better  or worse last year? ( альтернативный, т. к. есть разделительный союз -или в вопросе)
3)  When did he swim better? (специальный вопрос т. к. начинается со специального вопросительного слова _когда, и ответ требуется специальный на такие вопросы-где, куда, когда, зачем и т.д.)
4)  He swam better last year, didn't he? ( разделительный вопрос, состоит из 2 частей:  - повествовательного предложения- утвердительного или отрицательного и после запятой на конце предложения следует вопрос-хвостик - не так ли?)
 5)  Who swam better last year? (вопрос к подлежащему начинаем с вопросительного слова Who - кто?)

1 Peter: You (have been telephoning) for ages. Have you not nearly (finished)?
Jack: I (have not got) through yet. I (have been trying) to get our Paris office but the line (has been ) engaged all morning.
2 Ann (has failed) her driving test three times because she's so bad at reversing. But she (has been practising) reversing for the last week and I think she (has got) a bit better at it.
3 Tom: I have often (wondered) why Bill left the country so suddenly.
Peter: Actually, I have just (found) out.
4 He (has been playing) the bagpipes since six o'clock this morning. He has only just (stopped).
5 Why have you (not brought) me the letters for signature? Have you (not typed) them yet?
6 Tom (looking up absent-mindedly as Mary comes in): Have you been (sunbathing)?
Mary (crossly): Don't be ridiculous! It (has been raining) all day!
7 A pair of robins (have been building) a nest in the porch since last week. I (have been watching them from my window since they began.
8 The police (have not found) the murderer yet, but the dead man's brother (has been) in the station all day. The police say that he (has been helping) them with their enquiries.
9 They (have pulled) down most of the houses in this street, but they (have not touched) the old shop at the corner yet.
10 Tom is convinced that there is gold in these hills but we (have been searching) for six months and (have not seen) any sign of it.
11 I (have been waiting) for the prices of the houses to come down before buying a house, but I think I (have been waiting) too long and the prices are beginning to go up again.
12 Peter (has been) a junior clerk for three years. Lately he (has been looking) for a better post but so far he (has not found) anything.